How Can I Selectively Deserialize Properties in JSON.NET While Maintaining Compatibility?

Selective attribute deserialization in JSON.NET

While maintaining JSON compatibility, you may want to convert serialized properties from enums to classes. JSON.NET provides several ways to address this need:

Method 1: ShouldSerialize method

JSON.NET provides the ShouldSerialize method. You can prevent its inclusion by creating a ShouldSerializePropertyName method where PropertyName is the property to be excluded from serialization. For example:

<code class="language-csharp">public class Config
{
    public Fizz ObsoleteSetting { get; set; }

    public bool ShouldSerializeObsoleteSetting()
    {
        return false; // 从序列化中排除 ObsoleteSetting
    }
}</code>

Method 2: Use JObject to operate

Instead of using JsonConvert.SerializeObject, convert the Config object to a JSON object (JObject), remove the required properties, and serialize the resulting JObject:

<code class="language-csharp">var jo = JObject.FromObject(config);
jo["ObsoleteSetting"].Parent.Remove();
var json = jo.ToString();</code>

Method 3: Attribute-based exclusion

Applying [JsonIgnore] to the target property ensures it is excluded from serialization. However, to deserialize the property, create a private setter with the same property name and apply [JsonProperty] to it. For example:

<code class="language-csharp">public class Config
{
    [JsonIgnore]
    public Fizz ObsoleteSetting { get; set; }

    [JsonProperty("ObsoleteSetting")]
    private Fizz ObsoleteSettingSetter { set { ObsoleteSetting = value; } }
}</code>

By employing these technologies, you can selectively control the serialization and deserialization of properties, ensuring compatibility with existing JSON configurations while accommodating property changes.

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